{"instruction": "You are an expert in named entity recognition. Please extract entities that match the schema definition from the input. Return an empty list if the entity type does not exist. Please respond in the format of a JSON string.", "schema": ["GENE"], "input": "By in vitro immunoprecipitations and gel shift assays , we identified two classes of high affinity Engrailed - binding sites upstream of each of the two polyhomeotic transcription units ."}
{"GENE": ["Engrailed - binding sites"]}